Perturbation methods for cancelling multi-user interference

Author

Lu, Chun Chian

Author_Institution

Comput. & Commun. Res. Lab., ITRI, Hsinchu, Taiwan

fYear

2001

fDate

2001

Firstpage

204

Lastpage

209

Abstract

Based on perturbation theory, formulas for multi-user detection in CDMA systems are derived. Starting from single user detection and applying iterative perturbations to correct for interference, we obtain better linear combination amplitudes for codes of the multi-user waveform and hence lower bit error rate (BER). The computation complexity is reduced to the minimum by calculating the interference in frames and sliding 3-symbol-window for all users

Keywords

code division multiple access; codes; error statistics; interference suppression; multiuser channels; perturbation theory; radiofrequency interference; signal detection; spread spectrum communication; BER; CDMA systems; Walsh spreading codes; bit error rate; code division multiple access; computation complexity reduction; iterative perturbations; linear combination amplitudes; multi-user detection; multi-user interference cancellation; multi-user waveform; perturbation methods; perturbation theory; single user detection; sliding 3-symbol-window; Bit error rate; Communication systems; Delay effects; Detectors; Equations; Interference cancellation; Laboratories; Multiaccess communication; Multiuser detection; Perturbation methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers and Communications, 2001. Proceedings. Sixth IEEE Symposium on

Conference_Location

Hammamet

ISSN

1530-1346

Print_ISBN

0-7695-1177-5

Type

conf

DOI

10.1109/ISCC.2001.935376

Filename

935376